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Cheap flights from Belfast to San Francisco from £315

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SFO
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to San Francisco
Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 February 2026.

Fri 13/306:45
BHD
-
SFO
2 stops22h 56m
British Airways
Mon 16/306:21
SFO
-
BHD
2 stops24h 54m
British Airways
Deal found 31/1£607
Sat 28/223:10
BFS
-
SFO
3 stops47h 25m
Multiple Airlines
Sat 7/315:05
SFO
-
BFS
2 stops23h 15m
Multiple Airlines
Deal found 31/1£609
Tue 17/306:30
BFS
-
SFO
2 stops17h 05m
Multiple Airlines
Tue 24/318:20
SFO
-
BFS
2 stops14h 40m
Multiple Airlines
Deal found 31/1£616
Fri 24/406:30
BHD
-
SFO
1 stop15h 20m
British Airways
Tue 28/407:25
SFO
-
BHD
2 stops19h 20m
British Airways
Deal found 30/1£616
Sat 28/206:30
BHD
-
SFO
1 stop13h 20m
Delta
Sat 7/313:55
SFO
-
BHD
1 stop23h 05m
Delta
Deal found 31/1£637
Sun 1/307:10
BFS
-
SFO
3 stops39h 25m
Multiple Airlines
Mon 9/320:25
SFO
-
BFS
2 stops17h 45m
Multiple Airlines
Deal found 1/2£664

Find flight deals from Belfast to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 February 2026.

Round-trip from

£607

One-way from

£315

Popular in

July

Cheapest in

January
British Airways
  • British Airways
  • 13/3-16/3
  • 4 total stops
  • 47h 50m total
  • Belfast to San Francisco
Search Deals
2/3
  • 2/3
  • 3 total stops
  • 48h 10m total
  • Belfast to San Francisco
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£79 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£34 potential savings vs. average return price).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.

Fly from

Belfast

Fly to

San Francisco

Route

Depart

Return

Price

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 13/3

06:45-22:41

2 stops22h 56m

San Francisco

Mon 16/3

06:15-10:40

2 stops21h 25m

£608

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 28/2

23:10-14:35

3 stops47h 25m

San Francisco

Sat 7/3

15:05-22:20

2 stops23h 15m

£609

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 17/3

06:30-16:35

2 stops17h 05m

San Francisco

Tue 24/3

18:20-16:00

2 stops14h 40m

£616

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/4

06:30-13:50

1 stop15h 20m

San Francisco

Tue 28/4

07:25-10:45

2 stops19h 20m

£616

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 1/3

07:10-14:35

3 stops39h 25m

San Francisco

Mon 9/3

20:25-21:10

2 stops17h 45m

£664

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 2/3

22:20-14:30

3 stops48h 10m

£315

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 2/3

07:20-21:39

3 stops46h 19m

£315

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Wed 15/7

20:15-15:50

3 stops51h 35m

£530

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Best time to book a flight from Belfast to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast to San Francisco
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 2 February 2026.
Read through reviews of airlines operating flights from Belfast to San Francisco, such as American Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,211 reviews
Check prices

Crew

8.0

Comfort

7.2

Food

6.4

Overall

7.2

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.
American Airlines
7.2
Good
11,211 reviews
American Airlines
7.2
Good
11,211 reviews
Check prices

Crew

8.0

Comfort

7.2

Food

6.4

Overall

7.2

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.
British Airways
6.7
Okay
7,707 reviews
American Airlines
7.2
Good
11,211 reviews
Check prices

Crew

8.0

Comfort

7.2

Food

6.4

Overall

7.2

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

Related info for your journey

Find useful and relevant information for your journey from Belfast to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Francisco from Belfast?

    Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from Belfast. Booking flights from Belfast to San Francisco (SFO) should be relatively easy as there are 0 daily inbound flights from Belfast from 2 different airlines.

  • How long is the flight from Belfast to San Francisco?

    There are many flights that can get you from Belfast to San Francisco in 22h 56m. Fly via British Airways to get the fastest option. Belfast and San Francisco are separated by a distance of 5038 mi.

  • What are the cheapest airlines flying from Belfast to San Francisco round-trip?

    Flying on British Airways is currently your cheapest option to San Francisco, with prices starting at £389. Another option worth looking into is American Airlines, starting at £463 return. British Airways is currently priced 30% below the average price you’ll pay for this route.

  • Can I find deals for flights from Belfast to San Francisco that include hotel bookings?

    Yes. In addition to deals on Belfast to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to San Francisco.

  • Can I find deals for business class flights from Belfast to San Francisco?

    Yes. Cheapflights offers flight deals from Belfast to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale
Pacific Grove

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Belfast to San Francisco

Discover the top 2 airlines that operate flights from Belfast to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£389Average£548FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£463Average£513FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast to San Francisco?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Belfast today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Belfast to San Francisco?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Belfast to San Francisco.

Can Cheapflights find flights from Belfast to San Francisco with no change fees?

Certainly. Search results for flights to San Francisco from Belfast shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Belfast to San Francisco become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Belfast today and book when prices fit your budget.

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